THREAT The dodos are back, safe and sound, after Earth's first encounter with alien intelligence. (Yeah, it just had to be *them*.) However, they returned with potentially alarming news for everyone back on Earth. They were mistaken as members of an army of robots busily creating a miles-wide sphere of rocks that are fused together by an adhesive substance. If completed and launched to hit Earth it would produce an extinction-level event on par with the impact of 65 million years ago. Yes, that's just conjecture, and even if true we have no weapons to combat it. All we can do is wait and watch and hope we're wrong. Not exactly Flash Gordon, but this is real life. We'll keep this under wraps so as to avoid scaring everybody since there's nothing anyone can do about it anyway.